Electric fan



FIG. 1 is a perspective view of an embodiment of an electric fan in accordance with the principles of my invention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view of an electric fan. 

The ornamental design for an electric fan, as shown and described. 